Features:One instrument used for two purposes, can test both electric and magnetic field radiation stimutaneously.Sound and light alarm: When test result exceeds the safe value, the instrument will automatically alarm.Data locking: Press one button to lock the radiation value.Radiation assessment: To Remind you of making sure whether the radiation value is in the safe range.Large and clear LCD display screen for easy reading.Stylish design, compact size, simple operation, easy to carry and convenient for on-site measurement.Specification:Model: GM3120Material: PlasticColor: Shown As PictureUnit: V/m (Electric Field); T(Magnetic Field)Accuracy: Electric: 1V/m; Magnetic: 0.01TRange: Electric: 1-1999V/m; Magnetic: 0.01-99.99TAlarm Threshold: Electric: 40V/m; Magnetic: 0.4TDisplay: 3-1/2 LCD DisplayTest Bandwidth: 5Hz-3500MHzSample Time: About 0.4 SecondsTest Mode: Dual Mode Synchronous TestOverrange Indication: LCD Displays "1"Working Temperature: 0~50CRelative Humidity: <80%Storage Temperature: -10~50CRelative Humidity: 0~70%Power: 1 * 9V 6F22 Battery(excluded)Size: Approx.12.5*6*3cm/4.9*2.4*1.2inPackage Weight: Approx.164g/5.8ozPackage List:1 * Radiation Tester.Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.